The title of "world's greenest office building" now belongs to the NuOffice building in Munich, which features a green roof and a massive rooftop photovoltaic array. Meanwhile, the world's largest building (and not necessarily the greenest) just opened in China; it's 500 meters long, 400 meters wide and features a fake Mediterranean village. Inhabitat also got set for this year's Solar Decathlon by taking a look at DALE, a sun-powered micro home comprised of two prefab modules created by SCI-Arc and Caltech.